:root {
    --bg-color: #1c1c1c;
    --card-bg: #2a2a2a;
    --text-color: #e6e6e6;
    --title-color: #ffd700;
    --border-color: #3d3d3d;
    --hover-color: #333333;
    --chart-title-color: #ffd700;
    --chart-legend-color: #e6e6e6;
    --chart-axis-line-color: #4a4a4a;
    --chart-axis-label-color: #b8b8b8;
    --chart-split-line-color: rgba(74, 74, 74, 0.2);
    --chart-income-start-color: #ffd700;
    --chart-income-end-color: #ffa500;
    --chart-expense-start-color: #ff4d4f;
    --chart-expense-end-color: #ff7875;
}

.dashboard-container {
    background-color: var(--bg-color);
    color: var(--text-color);
    background-image: linear-gradient(45deg, rgba(255, 215, 0, 0.05) 25%, transparent 25%, transparent 50%, rgba(255, 215, 0, 0.05) 50%, rgba(255, 215, 0, 0.05) 75%, transparent 75%, transparent);
    background-size: 20px 20px;
}

.data-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.data-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, #ffd700, transparent);
}

.data-card:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

.data-title {
    color: var(--title-color);
    font-weight: 500;
}

.data-value {
    color: #ffd700;
    font-weight: bold;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.data-trend {
    color: var(--text-color);
}

.theme-selector {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.theme-selector option {
    background-color: var(--card-bg);
    color: var(--text-color);
} 